3-4 hours with screen on auto mode when squelch broken. Also, battery indicator fluctuates when around half and under when receiving signal (This will be commented on when I write up full review, and many other things, after next firmware update which is meant to be any day now).
A comment for AOR will be that there should be or make it a percentage value next of he Batt indicator so that users have an idea of % left in battery. Better yet, in menu allow indicative amount of time left would also be good.
In this day and age it astounds me that many receiver/radio manufacturers do not look to mobile phone interfaces/menu options for better ease of use and naming conventions.
And lastly - on batteries, why on earth can't we get 4000-5000 mA batteries when most phones have that size now and are much slimmer than what is package in current receivers/radio's. Which charge in around 1 hour or less. Not the 5-6 plus hours of the AOR.